Here are some cheats and tips for the game Jackie Chan’s Action Kung Fu.
Level select:
Reset the NES three times during the title screen, then press
Up(2), Down(2), Up, Down, B,
A on controller two.
Level select, ninety-nine continues:
Intentionally lose the game and wait until the title screen
appears after the game over screen. Then, press Up(2),
Down(2), Up, Down, B, A, Start
on controller one, then press B on controller two. Press
Up or Down to select an new level, then press B
on controller two to begin game play.